Vietnam has exhibited rapid economic growth over thirty years of comprehensive economic reforms. However, about half of the country’s active population remains in agriculture. In order to characterize the role of agriculture and livestock in Vietnam’s structural transformation, we assess ongoing dynamics at three complementary scales: national, sectoral (agriculture and livestock) and local (district of Bavi). We show that the transition since Doi Moi (Renovation) has given rise to a political economy that provides incentives to industries and services. However, labor (...) abundance (due to population density) and limited land availability (85% of agricultural land is composed of less than 1 ha farms) have slowed the canonical structural transformation, and widened income inequality between agriculture and non-agricultural workers. In this ‘Lewis trap’ context, intensive livestock (as it is the case for aquaculture and horticulture) has played a significant role in increasing labor and land productivity, offering some perspectives to secure smallholder agricultural systems. But the emergence of those very intensive systems producing a lot of effluents has in the same time jeopardized sustainable development of rural and peri-urban areas. More recently, the political shift towards industrial corporate agriculture and large-scale farming has increased this pressure on the environment, and endangered inclusive agricultural development. Today, smallholder farming and rural communities encounter many challenges to exploit resources efficiently and gain access to input markets to achieve higher productivity and value added. To avoid the risk of poverty trap and to pursue a sustainable and inclusive development over the long run, deeper and wider reforms are needed based on smallholder viability, agroecological principles, and crop-livestock integration. (shrink)

In a very general sense, hybrid can be understood to be any organism that is the product of two (or more) organisms where each parent belongs to a different kind. For example; the offspring from two or more parent organisms, each belonging to a separate species (or genera), is called a “hybrid”. “Hybridity” refers to the phenomenal character of being a hybrid. And “hybridization ” refers to both natural and artificial processes of generating hybrids. These processes include mechanisms of selective (...) cross-breeding and cross-fertilization of parents of different species for the purpose of producing hybrid offspring. In addition to these processes, “hybridization ” also refers to natural and artificial processes of whole genome duplication that result in the doubling or trebling of the sets of chromosomes of the organism. This entry provides an overview of the impact of hybridity on agriculture. It begins with an historical sketch that traces the early horticulturalists’ and naturalists’ investigations of hybrids. This starts with the observations of Thomas Fairchild and Georges-Louis Leclerc, Comte de Buffon; and leads to the explanation of its mechanism by Gregor Mendel, James Watson and Francis Crick, and Ernst Mayr; and the eventual manipulation of hybrids and hybridization by Barbara McClintock. Following this, the reader is introduced to a number of key terms and concepts in use within current research as well as highlighting diverse ethical concerns that center on hybridization. Recent research that attempts to ascertain the role of hybridization in adaptive change will be introduced. This will include research on the evolution of crop species, increased biodiversity, and the use of hybrids to manipulate phenotypically desirable traits in agricultural crops. The focus of the discussion is on a particularly significant type of naturally occurring hybridization, polyploidy hybridization. Polyploids are organisms which have more than two complete genomes in each cell. This kind of hybridization is ubiquitous among crop plants. The role of polyploidy in plant evolution and the affects of polyploidy on plants and animals will be reviewed. A critical discussion of its agricultural value in the production of fertile polyploid hybrids highlights key epistemological, ontological, and ethical issues. These are illuminated with reference to the distinct processes of artificial and natural hybridization. A survey of these different kinds of hybridization includes the ethical and economic impacts of hybridity on global nutrition, the environment, and considerations of some practical implications for the agricultural industry. Tracking the role of hybrids, the process of hybridization, and the current impacts of it for agriculture requires knowledge of the history of its early conceptualization, understanding, and use. This is the topic of the following section. (shrink)